Year	% of expense
2010	20.77200401014475
2011	18.27786720528608
2012	17.88813418565372
2013	18.16214985196994
2014	21.463391689486684
2015	27.606281664081518
2016	9.0132261019293
2017	9.809084144524968
2018	15.473230579151565
2019	12.061866645978663
2020	20.489318286215493
2021	36.83009012011016
2022	42.802356431223814